package com.atguigu.springcloud.controller;

import com.atguigu.springcloud.controller.lb.LoadBalancer;
import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

/**
 * Created with IntelliJ IDEA.
 *
 * @Auther: hjj
 * @Date: 2021/11/01/10:16
 * @Description:
 */
@RestController
@Slf4j
public class OrderController {

    public static final String PAYMENT_URL = "http://localhost:8001";
    //public static final String PAYMENT_URL = "http://CLOUD-PAYMENT-SERVICE";
    @Resource
    private RestTemplate restTemplate;
    @Resource
    private LoadBalancer loadBalancer;
    @Resource
    private DiscoveryClient discoveryClient;


    @PostMapping("/consumer/payment/create")
    public CommonResult<Payment> create( Payment payment){
        return restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment,CommonResult.class);
    }

    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable("id") Long id){
        return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
    }

    /**
     * @Author hjj
     * @Description: getEntity 包含有一些响应头、状态码信息
      * @Date  2021/11/8 18:00
     **/
    @GetMapping("/consumer/payment/getForEntity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable("id") Long id){
       ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
       if (entity.getStatusCode().is2xxSuccessful()){
           log.info("响应头"+entity.getHeaders()+"\t"+"状态值："+entity.getStatusCodeValue());
           return entity.getBody();
       }else {
           return new CommonResult(111,"操作失败",null);
       }
    }

    @PostMapping("/consumer/payment/createForEntity")
    public CommonResult<Payment> create2( Payment payment){
        return restTemplate.postForEntity(PAYMENT_URL+"/payment/create",payment,CommonResult.class).getBody();
    }

    @GetMapping(value = "/consumer/payment/lb")
    public String getPaymentLB(){
        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
        if(instances == null || instances.size()<=0){
            return null;
        }
        ServiceInstance serviceInstance = loadBalancer.instances(instances);
        URI uri = serviceInstance.getUri();
        return restTemplate.getForObject(uri+"/payment/lb",String.class);
    }

    //===> zipkin+sleuth
    @GetMapping(value = "/consumer/zipkin")
    public String paymentZipkin(){
        String result = restTemplate.getForObject("http://localhost:8001"+"/payment/zipkin",String.class);
        return result;
    }


}
